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Florian Echtler4244f722005-05-06 19:05:39 +02001/* Siemens ID Mouse driver v0.6
Linus Torvalds1da177e2005-04-16 15:20:36 -07002
3 This program is free software; you can redistribute it and/or
4 modify it under the terms of the GNU General Public License as
5 published by the Free Software Foundation; either version 2 of
6 the License, or (at your option) any later version.
7
8 Copyright (C) 2004-5 by Florian 'Floe' Echtler <echtler@fs.tum.de>
9 and Andreas 'ad' Deresch <aderesch@fs.tum.de>
10
11 Derived from the USB Skeleton driver 1.1,
12 Copyright (C) 2003 Greg Kroah-Hartman (greg@kroah.com)
13
Florian Echtler4244f722005-05-06 19:05:39 +020014 Additional information provided by Martin Reising
15 <Martin.Reising@natural-computing.de>
16
Linus Torvalds1da177e2005-04-16 15:20:36 -070017*/
18
Linus Torvalds1da177e2005-04-16 15:20:36 -070019#include <linux/kernel.h>
20#include <linux/errno.h>
21#include <linux/delay.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include <linux/slab.h>
23#include <linux/module.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include <linux/completion.h>
Arjan van de Ven4186ecf2006-01-11 15:55:29 +010025#include <linux/mutex.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include <asm/uaccess.h>
27#include <linux/usb.h>
28
Florian Echtler4244f722005-05-06 19:05:39 +020029/* image constants */
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#define WIDTH 225
Florian Echtler4244f722005-05-06 19:05:39 +020031#define HEIGHT 289
32#define HEADER "P5 225 289 255 "
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#define IMGSIZE ((WIDTH * HEIGHT) + sizeof(HEADER)-1)
34
Florian Echtler4244f722005-05-06 19:05:39 +020035/* version information */
36#define DRIVER_VERSION "0.6"
Linus Torvalds1da177e2005-04-16 15:20:36 -070037#define DRIVER_SHORT "idmouse"
38#define DRIVER_AUTHOR "Florian 'Floe' Echtler <echtler@fs.tum.de>"
39#define DRIVER_DESC "Siemens ID Mouse FingerTIP Sensor Driver"
40
Florian Echtler4244f722005-05-06 19:05:39 +020041/* minor number for misc USB devices */
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#define USB_IDMOUSE_MINOR_BASE 132
43
Florian Echtler4244f722005-05-06 19:05:39 +020044/* vendor and device IDs */
45#define ID_SIEMENS 0x0681
46#define ID_IDMOUSE 0x0005
47#define ID_CHERRY 0x0010
48
49/* device ID table */
Németh Márton33b9e162010-01-10 15:34:45 +010050static const struct usb_device_id idmouse_table[] = {
Florian Echtler4244f722005-05-06 19:05:39 +020051 {USB_DEVICE(ID_SIEMENS, ID_IDMOUSE)}, /* Siemens ID Mouse (Professional) */
52 {USB_DEVICE(ID_SIEMENS, ID_CHERRY )}, /* Cherry FingerTIP ID Board */
53 {} /* terminating null entry */
Linus Torvalds1da177e2005-04-16 15:20:36 -070054};
55
Florian Echtler4244f722005-05-06 19:05:39 +020056/* sensor commands */
57#define FTIP_RESET 0x20
58#define FTIP_ACQUIRE 0x21
59#define FTIP_RELEASE 0x22
60#define FTIP_BLINK 0x23 /* LSB of value = blink pulse width */
61#define FTIP_SCROLL 0x24
62
63#define ftip_command(dev, command, value, index) \
64 usb_control_msg (dev->udev, usb_sndctrlpipe (dev->udev, 0), command, \
65 USB_TYPE_VENDOR | USB_RECIP_ENDPOINT | USB_DIR_OUT, value, index, NULL, 0, 1000)
66
Linus Torvalds1da177e2005-04-16 15:20:36 -070067MODULE_DEVICE_TABLE(usb, idmouse_table);
Oliver Neukum54d2bc02007-10-23 14:23:13 +020068static DEFINE_MUTEX(open_disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -070069
70/* structure to hold all of our device specific stuff */
71struct usb_idmouse {
72
73 struct usb_device *udev; /* save off the usb device pointer */
74 struct usb_interface *interface; /* the interface for this device */
75
76 unsigned char *bulk_in_buffer; /* the buffer to receive data */
Florian Echtler4244f722005-05-06 19:05:39 +020077 size_t bulk_in_size; /* the maximum bulk packet size */
78 size_t orig_bi_size; /* same as above, but reported by the device */
Linus Torvalds1da177e2005-04-16 15:20:36 -070079 __u8 bulk_in_endpointAddr; /* the address of the bulk in endpoint */
80
81 int open; /* if the port is open or not */
82 int present; /* if the device is not disconnected */
Oliver Neukum54d2bc02007-10-23 14:23:13 +020083 struct mutex lock; /* locks this structure */
Linus Torvalds1da177e2005-04-16 15:20:36 -070084
85};
86
87/* local function prototypes */
88static ssize_t idmouse_read(struct file *file, char __user *buffer,
89 size_t count, loff_t * ppos);
90
91static int idmouse_open(struct inode *inode, struct file *file);
92static int idmouse_release(struct inode *inode, struct file *file);
93
94static int idmouse_probe(struct usb_interface *interface,
95 const struct usb_device_id *id);
96
97static void idmouse_disconnect(struct usb_interface *interface);
Oliver Neukumd9bfbd12009-07-12 23:58:23 +020098static int idmouse_suspend(struct usb_interface *intf, pm_message_t message);
99static int idmouse_resume(struct usb_interface *intf);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100
101/* file operation pointers */
Luiz Fernando N. Capitulino066202d2006-08-05 20:37:11 -0300102static const struct file_operations idmouse_fops = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700103 .owner = THIS_MODULE,
104 .read = idmouse_read,
105 .open = idmouse_open,
106 .release = idmouse_release,
Arnd Bergmann6038f372010-08-15 18:52:59 +0200107 .llseek = default_llseek,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700108};
109
Greg Kroah-Hartmand6e5bcf2005-06-20 21:15:16 -0700110/* class driver information */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700111static struct usb_class_driver idmouse_class = {
Greg Kroah-Hartmand6e5bcf2005-06-20 21:15:16 -0700112 .name = "idmouse%d",
Linus Torvalds1da177e2005-04-16 15:20:36 -0700113 .fops = &idmouse_fops,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700114 .minor_base = USB_IDMOUSE_MINOR_BASE,
115};
116
117/* usb specific object needed to register this driver with the usb subsystem */
118static struct usb_driver idmouse_driver = {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 .name = DRIVER_SHORT,
120 .probe = idmouse_probe,
121 .disconnect = idmouse_disconnect,
Oliver Neukumd9bfbd12009-07-12 23:58:23 +0200122 .suspend = idmouse_suspend,
123 .resume = idmouse_resume,
124 .reset_resume = idmouse_resume,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700125 .id_table = idmouse_table,
Oliver Neukumd9bfbd12009-07-12 23:58:23 +0200126 .supports_autosuspend = 1,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700127};
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129static int idmouse_create_image(struct usb_idmouse *dev)
130{
Mariusz Kozlowski54ecf1f2006-11-06 17:37:20 +0100131 int bytes_read;
132 int bulk_read;
133 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700134
Florian Echtler4244f722005-05-06 19:05:39 +0200135 memcpy(dev->bulk_in_buffer, HEADER, sizeof(HEADER)-1);
Mariusz Kozlowski54ecf1f2006-11-06 17:37:20 +0100136 bytes_read = sizeof(HEADER)-1;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700137
Florian Echtler4244f722005-05-06 19:05:39 +0200138 /* reset the device and set a fast blink rate */
139 result = ftip_command(dev, FTIP_RELEASE, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700140 if (result < 0)
Florian Echtler4244f722005-05-06 19:05:39 +0200141 goto reset;
142 result = ftip_command(dev, FTIP_BLINK, 1, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700143 if (result < 0)
Florian Echtler4244f722005-05-06 19:05:39 +0200144 goto reset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700145
Florian Echtler4244f722005-05-06 19:05:39 +0200146 /* initialize the sensor - sending this command twice */
147 /* significantly reduces the rate of failed reads */
148 result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700149 if (result < 0)
Florian Echtler4244f722005-05-06 19:05:39 +0200150 goto reset;
151 result = ftip_command(dev, FTIP_ACQUIRE, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152 if (result < 0)
Florian Echtler4244f722005-05-06 19:05:39 +0200153 goto reset;
154
155 /* start the readout - sending this command twice */
156 /* presumably enables the high dynamic range mode */
157 result = ftip_command(dev, FTIP_RESET, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158 if (result < 0)
Florian Echtler4244f722005-05-06 19:05:39 +0200159 goto reset;
160 result = ftip_command(dev, FTIP_RESET, 0, 0);
161 if (result < 0)
162 goto reset;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163
164 /* loop over a blocking bulk read to get data from the device */
165 while (bytes_read < IMGSIZE) {
166 result = usb_bulk_msg (dev->udev,
167 usb_rcvbulkpipe (dev->udev, dev->bulk_in_endpointAddr),
168 dev->bulk_in_buffer + bytes_read,
169 dev->bulk_in_size, &bulk_read, 5000);
Florian Echtler4244f722005-05-06 19:05:39 +0200170 if (result < 0) {
171 /* Maybe this error was caused by the increased packet size? */
172 /* Reset to the original value and tell userspace to retry. */
173 if (dev->bulk_in_size != dev->orig_bi_size) {
174 dev->bulk_in_size = dev->orig_bi_size;
175 result = -EAGAIN;
176 }
177 break;
178 }
179 if (signal_pending(current)) {
180 result = -EINTR;
181 break;
182 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700183 bytes_read += bulk_read;
184 }
185
186 /* reset the device */
Florian Echtler4244f722005-05-06 19:05:39 +0200187reset:
188 ftip_command(dev, FTIP_RELEASE, 0, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700189
Florian Echtler4244f722005-05-06 19:05:39 +0200190 /* check for valid image */
191 /* right border should be black (0x00) */
192 for (bytes_read = sizeof(HEADER)-1 + WIDTH-1; bytes_read < IMGSIZE; bytes_read += WIDTH)
193 if (dev->bulk_in_buffer[bytes_read] != 0x00)
194 return -EAGAIN;
195
196 /* lower border should be white (0xFF) */
197 for (bytes_read = IMGSIZE-WIDTH; bytes_read < IMGSIZE-1; bytes_read++)
198 if (dev->bulk_in_buffer[bytes_read] != 0xFF)
199 return -EAGAIN;
200
201 /* should be IMGSIZE == 65040 */
Greg Kroah-Hartmana341c6b2012-05-01 21:33:58 -0700202 dev_dbg(&dev->interface->dev, "read %d bytes fingerprint data\n",
203 bytes_read);
Florian Echtler4244f722005-05-06 19:05:39 +0200204 return result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205}
206
Oliver Neukumd9bfbd12009-07-12 23:58:23 +0200207/* PM operations are nops as this driver does IO only during open() */
208static int idmouse_suspend(struct usb_interface *intf, pm_message_t message)
209{
210 return 0;
211}
212
213static int idmouse_resume(struct usb_interface *intf)
214{
215 return 0;
216}
217
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218static inline void idmouse_delete(struct usb_idmouse *dev)
219{
220 kfree(dev->bulk_in_buffer);
221 kfree(dev);
222}
223
224static int idmouse_open(struct inode *inode, struct file *file)
225{
Mariusz Kozlowski54ecf1f2006-11-06 17:37:20 +0100226 struct usb_idmouse *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 struct usb_interface *interface;
Mariusz Kozlowski54ecf1f2006-11-06 17:37:20 +0100228 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700229
Linus Torvalds1da177e2005-04-16 15:20:36 -0700230 /* get the interface from minor number and driver information */
231 interface = usb_find_interface (&idmouse_driver, iminor (inode));
Oliver Neukumdbdae3b2010-01-14 16:11:03 +0100232 if (!interface)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233 return -ENODEV;
Alan Sternd4ead162007-05-22 11:46:41 -0400234
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200235 mutex_lock(&open_disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700236 /* get the device information block from the interface */
237 dev = usb_get_intfdata(interface);
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200238 if (!dev) {
239 mutex_unlock(&open_disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240 return -ENODEV;
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200241 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242
243 /* lock this device */
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200244 mutex_lock(&dev->lock);
245 mutex_unlock(&open_disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700246
247 /* check if already open */
248 if (dev->open) {
249
250 /* already open, so fail */
251 result = -EBUSY;
252
253 } else {
254
255 /* create a new image and check for success */
Oliver Neukumd9bfbd12009-07-12 23:58:23 +0200256 result = usb_autopm_get_interface(interface);
257 if (result)
258 goto error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700259 result = idmouse_create_image (dev);
Junjie Mao0b41d352016-02-22 10:48:45 +0800260 usb_autopm_put_interface(interface);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700261 if (result)
262 goto error;
263
264 /* increment our usage count for the driver */
265 ++dev->open;
266
267 /* save our object in the file's private structure */
268 file->private_data = dev;
269
270 }
271
272error:
273
274 /* unlock this device */
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200275 mutex_unlock(&dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700276 return result;
277}
278
279static int idmouse_release(struct inode *inode, struct file *file)
280{
281 struct usb_idmouse *dev;
282
Tobias Klauser47278102006-12-20 11:42:12 +0100283 dev = file->private_data;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700284
Alan Sternd4ead162007-05-22 11:46:41 -0400285 if (dev == NULL)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700286 return -ENODEV;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200288 mutex_lock(&open_disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 /* lock our device */
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200290 mutex_lock(&dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291
292 /* are we really open? */
293 if (dev->open <= 0) {
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200294 mutex_unlock(&dev->lock);
295 mutex_unlock(&open_disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700296 return -ENODEV;
297 }
298
299 --dev->open;
300
301 if (!dev->present) {
302 /* the device was unplugged before the file was released */
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200303 mutex_unlock(&dev->lock);
304 mutex_unlock(&open_disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305 idmouse_delete(dev);
Alan Sternd4ead162007-05-22 11:46:41 -0400306 } else {
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200307 mutex_unlock(&dev->lock);
308 mutex_unlock(&open_disc_mutex);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700310 return 0;
311}
312
313static ssize_t idmouse_read(struct file *file, char __user *buffer, size_t count,
314 loff_t * ppos)
315{
Tobias Klauser47278102006-12-20 11:42:12 +0100316 struct usb_idmouse *dev = file->private_data;
Mariusz Kozlowski54ecf1f2006-11-06 17:37:20 +0100317 int result;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318
Florian Echtler4244f722005-05-06 19:05:39 +0200319 /* lock this object */
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200320 mutex_lock(&dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700321
Florian Echtler4244f722005-05-06 19:05:39 +0200322 /* verify that the device wasn't unplugged */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 if (!dev->present) {
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200324 mutex_unlock(&dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325 return -ENODEV;
326 }
327
Al Viro018a2cd2005-10-29 11:56:13 +0100328 result = simple_read_from_buffer(buffer, count, ppos,
329 dev->bulk_in_buffer, IMGSIZE);
Florian Echtler4244f722005-05-06 19:05:39 +0200330 /* unlock the device */
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200331 mutex_unlock(&dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700332 return result;
333}
334
335static int idmouse_probe(struct usb_interface *interface,
336 const struct usb_device_id *id)
337{
338 struct usb_device *udev = interface_to_usbdev(interface);
Mariusz Kozlowski54ecf1f2006-11-06 17:37:20 +0100339 struct usb_idmouse *dev;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700340 struct usb_host_interface *iface_desc;
341 struct usb_endpoint_descriptor *endpoint;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 int result;
343
344 /* check if we have gotten the data or the hid interface */
345 iface_desc = &interface->altsetting[0];
346 if (iface_desc->desc.bInterfaceClass != 0x0A)
347 return -ENODEV;
348
349 /* allocate memory for our device state and initialize it */
Oliver Neukum092e4622006-01-06 22:36:27 +0100350 dev = kzalloc(sizeof(*dev), GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700351 if (dev == NULL)
352 return -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700353
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200354 mutex_init(&dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700355 dev->udev = udev;
356 dev->interface = interface;
357
358 /* set up the endpoint information - use only the first bulk-in endpoint */
359 endpoint = &iface_desc->endpoint[0].desc;
Luiz Fernando N. Capitulinoa7dc2182006-10-26 13:02:52 -0300360 if (!dev->bulk_in_endpointAddr && usb_endpoint_is_bulk_in(endpoint)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 /* we found a bulk in endpoint */
Kuninori Morimoto29cc8892011-08-23 03:12:03 -0700362 dev->orig_bi_size = usb_endpoint_maxp(endpoint);
Florian Echtler4244f722005-05-06 19:05:39 +0200363 dev->bulk_in_size = 0x200; /* works _much_ faster */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700364 dev->bulk_in_endpointAddr = endpoint->bEndpointAddress;
365 dev->bulk_in_buffer =
Florian Echtler4244f722005-05-06 19:05:39 +0200366 kmalloc(IMGSIZE + dev->bulk_in_size, GFP_KERNEL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700367
368 if (!dev->bulk_in_buffer) {
Greg Kroah-Hartmanef1ffb72012-04-20 16:53:42 -0700369 dev_err(&interface->dev, "Unable to allocate input buffer.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 idmouse_delete(dev);
371 return -ENOMEM;
372 }
373 }
374
375 if (!(dev->bulk_in_endpointAddr)) {
Greg Kroah-Hartmanef1ffb72012-04-20 16:53:42 -0700376 dev_err(&interface->dev, "Unable to find bulk-in endpoint.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377 idmouse_delete(dev);
378 return -ENODEV;
379 }
380 /* allow device read, write and ioctl */
381 dev->present = 1;
382
383 /* we can register the device now, as it is ready */
384 usb_set_intfdata(interface, dev);
385 result = usb_register_dev(interface, &idmouse_class);
386 if (result) {
387 /* something prevented us from registering this device */
Rahul Bedarkar45868b32014-01-02 19:25:50 +0530388 dev_err(&interface->dev, "Unable to allocate minor number.\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700389 usb_set_intfdata(interface, NULL);
390 idmouse_delete(dev);
391 return result;
392 }
393
394 /* be noisy */
395 dev_info(&interface->dev,"%s now attached\n",DRIVER_DESC);
396
397 return 0;
398}
399
400static void idmouse_disconnect(struct usb_interface *interface)
401{
402 struct usb_idmouse *dev;
403
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404 /* get device structure */
405 dev = usb_get_intfdata(interface);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700406
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 /* give back our minor */
408 usb_deregister_dev(interface, &idmouse_class);
409
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200410 mutex_lock(&open_disc_mutex);
411 usb_set_intfdata(interface, NULL);
412 /* lock the device */
413 mutex_lock(&dev->lock);
414 mutex_unlock(&open_disc_mutex);
Alan Sternd4ead162007-05-22 11:46:41 -0400415
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416 /* prevent device read, write and ioctl */
417 dev->present = 0;
418
Linus Torvalds1da177e2005-04-16 15:20:36 -0700419 /* if the device is opened, idmouse_release will clean this up */
Alan Sternd4ead162007-05-22 11:46:41 -0400420 if (!dev->open) {
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200421 mutex_unlock(&dev->lock);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700422 idmouse_delete(dev);
Alan Sternd4ead162007-05-22 11:46:41 -0400423 } else {
424 /* unlock */
Oliver Neukum54d2bc02007-10-23 14:23:13 +0200425 mutex_unlock(&dev->lock);
Alan Sternd4ead162007-05-22 11:46:41 -0400426 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
Greg Kroah-Hartman1b29a372008-08-18 13:21:04 -0700428 dev_info(&interface->dev, "disconnected\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429}
430
Greg Kroah-Hartman65db4302011-11-18 09:34:02 -0800431module_usb_driver(idmouse_driver);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700432
433MODULE_AUTHOR(DRIVER_AUTHOR);
434MODULE_DESCRIPTION(DRIVER_DESC);
435MODULE_LICENSE("GPL");
436